Lathe-tool.



PATENTED NOV. 19, 190/.

J. P. AYLBSWORTH.

LATHE TOOL.

APPLIOATION FILED NOV.24, 1906.

llll lql l1 |l .1| .l Pl l[| Ill. I l I 1 I I I IIIL A lnFlllllllllLl HIHHHIIIII WITNESSES ATTORNEYS JULIUS P. AYLESWORTH, OF ENDEAVOR, PENNSYLVANIA.

LATHE-TOOL.

Specification of Letters I'atent.

Patented Nov. 19, 1907.

Application filed November 24.1906. Serial No. 344.864.

To all whom it may concern:

Be it known that I, JULIUS P. AYLES-J WORTH, a citizen of the'United States, and

a resident of Endeavor, in the county of Forest and State of Pennsylvania, have in vented a new and Improved Lathe-Tool, of which the following is a full, clear, and exact I description.

.This'invention is an improved tool designed for use in connection with a machine lathe to accurately center the work carried by the lathe, with ease and facility.

One embodimentof the invention consists of a shank having an arm pivotally connected near the outer end thereof, said arm projecting slightly beyond the shank, where itis provided with an apertured enlargem'ent for holding devices used in the centering operation. A suitable adjusting and a clamping screw are carried by the shank-for adjusting the vertical height of the centering device and clamping the samein adjusted position.

1 Reference is to be had to the adcompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 isa plan view of my improved centering tool, showing in dotted outline the.

manner in which it is applied to the toolpost of a lathe'and used to center a shaft or other like device clamped in the chuck, and

Fig. 2 is a side elevationof the tool.

' Thepreferred form of tool comprises a shank 1 square or oblong in cross section, or of other suitable form to be conveniently applied to the tool-post of a machine lathe.

- Iivotally attached to the outer end of the shank 1 as by a bolt 2, is an arm 3. This arm extends at its outer end just beyond the shank 1, where it is provided with an apertured enlargement 4 for receivingthe shank of drills, countersinks or other centering devices. These are held in place by a setscrew 5 threaded into the enlargement and passing into the aperture of the same.

At the rear of the pivot-bolt 2 an ear 6 is formed as an integral part, or otherwise secured to the upper edge of the shank 1 and overhangs the rear end of the arm 3. A thumb-screw 7 is threaded through this car bearing on the arm, and is operable to adjust the vertical height of the centering device.

For securing the arm in. adjusted position, an arc-shaped slot 8 is cuttherein concentrio with the pivot-bolt- 2 and is engaged by a screw 9 threaded into the shank 1. The arm 3 is constructed and pivoted at a point so that/its inner end will, through the action of gravity, at all times press on the screw 7, thus requiring no additional device to keep these arts engaged.

, In t is use of the tool, theshank 1 is applied to the tool-post in the ordinary manner, and a eountersinking device clamped in the arm by the set-screw 5. The carriages of the lathe and the thumb-screw 7 are then operated-to bring the countersink to the cen ter of the work when the longitudinal feed of the lathe is moved forward to cut a smlicient opening in the work for guiding a drill. The drill is then substituted for the countersink and likewise brought into action; The countersink is then again placed in the holder and the center cut to the desired proportion. Having thus described my invention I claim as new and desire to secure by Letters Patent:

1. 'A' lathe tool comprising a shank, an arm pivotally attached to the shank havin .rneans for clamping a device in the outer em t ereof, and a screw carried by the shank p 'essing on the arm, said arm being so balanced on its pivot as to normally engage the screw.

2. A lathe tool comprising a shank, an arm pivotally connected to the shank having an a erture assin transversely therethro h P P q eccentric to its pivotal connection, means or clamping a tool in the aperture and means 4 for holding the arm against movement with respect to the shank.

3. A lathe tool comprising a shank, an arm pivotally connected to the shank having an aperture passing transversely theretbrou h eccentric to its pivotal connection, means or cla npin a tool in the aperture, and means remove from said pivotal connection for clamping the arm in adjusted position.

In testimony. whereof I have signed my name to this specification in the presence of' two subscribing witnesses.

JULIUS P AYLESWORTH. 

